Improvement in loom shedding mechanisms



2 Sheets--Shee't 2.

l. L. W-ILBEB. Loom-shedding Machanisms.

Patented Oct. 28,1873.v

w In@ QVM.

a/iff v UNITED STATES PATENT EErcE.

IMPROVEMENT IN LOM SHEDDING MECHANISMS.

Specification forming part of Letters Patent No. ILBJ, dated October 28,1873; application filed August 16,1873.

To all whom tt may concern:

Be it known that I, ISAAC L. WILBER, of Taunton, n the county of Bristol and State of Massachusetts, have invented an Improvement in Looms 5 and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specication, is a description of my invention suflicient to enable those skilled in the art to practice it.

The invention relates to an improvement in that class of fancy looms in which upright harness-levers are employed to effect the shedding of the warp.

In my invention, the levers being pivoted at about their centers, I extend from each lever, at or near its pivotal point, two arms, one eX- tending right an gularly, or approximately so, from the lever, and the other extending at an acute angle from the lever, it being nearly right angular to the first. The pattern-chain is so arranged, with relation to the arms of the respective levers, that the lever-arms embrace the operative rolls of the pattern-chain, one of the arms of each pair being held or operated by some one of the rolls of the chain, the lever being moved to raise the harnessframe when a roll acts against the vertical arm of either lever to throw it back, and being moved to depress said frame if a roll acts upon the horizontal arm to throw it up. The levers are positively operated by the action of the chain upon these arms, and in forming each shed those levers only are actuated that are requiredto be moved for the change of warp, the shed bein g always open, and the un changed levers being held by notched levers or other devices during the formation of the shed, all of the levers being locked in position by the pattern-chain after the shed is formed, or for the pick.

The drawing represents a loom embodying my invention, only such parts of the loom being shown as have direct connection with my invention.

Figure 1 shows the loom in elevation. Figs. 2 and 3 show the upright levers in side and end elevation.

a denotes the loom -frame 5 b, the crank shaft 5 c, the harness -fra1nes. By suitable cording and sheaves, these frames are connected at top and bottom to the upper and lower ends of the upright harness-levers d. These levers d are pivoted upon a pin, e, at or near their center, and placed outside of them is the pattern mechanism, eonsistingof a chain carrying pins, upon which are rolls f, the chain running upon wheels g on a shaft, h, journaled in suitable bearings, and carrying a bevelwheel, t, to which motion is imparted by a bevel-pinion, 7:,on the crank-shaft b. From each lever extends the horizontal or approximately horizontal arm l, and the vertical or approximately vertical arm m, each arm l eX- tending from one side face of the lever, and each arm m from the opposite side thereof, or so that the two arms are in two planes, by which means a roll that operates the horizontal arm may be in the plane of such arms only, and the roll that operates the other arms in the planes of such arms only; whereas, if the arms were in the same plane, they would both be necessarily operated (successively) by a roll that operated either.

As the chain moves, the rolls or rings (listribute the levers (Z and harness-frames in ac-4 cordance with the shed to be formed, and as each lever comes to position, one of two notches, n, in a lever, 0, drawn down by a spring, p, springs over a pin, q, extending from one side of the lever d, the notched levers thus holdin g the harness-levers in respective positions for the open shed and the movement of the shuttle, while the chain moves on to bring the next set of rolls into position for the next shed. As t-he rolls strike the arms lm, they press such levers as are to move, so that the pins leave the notches, the harness-levers not to move being still held by the notches of the stop-levers. When the rolls are not in contact with the arms, all the harness-fram es may be brought by hand into the same plane, to close the warp for any purpose, the stop-levers 0 readily yielding to permit the harness-levers to move.

By my construction, the harness mechanism is very much simplified, the harness-levers are positively moved, a perfect organization for an open shed is obtained, and the loom may be made for any desirable number of di l'i'erent picks or shades.

I claim- The notched spring-levers o, in combination with the upright harness-levers d, arms l m, and pattern-chai n, and operating substantially as described.

ISAAC L. IVILBER.

Witnesses:

Wn. O. Lovnnrne, C. D. hlcDUrmn. 

